William wilkinson



W WILKINSON. YEETIGAL MULTI'IUBULAR BOILER. No. 279,470. Patented June 12,1883.-

(No Model.)

WTNESSEIS: F :1 L INVENTOR.

I121. [LC/II f ow,

' UNITED STATES PATENT OFFICE.

WILLIAM WILKINSON, OF WIGAN, COUNTY OF LAN OASTER, ENGLAND.

VERTICAL MULTITUBL JLAR BOILER.

SPECIFICATION forming part of Letters PatentNo. 279,470, dated June 12, 1883.

Application filed March 2, 1883. (No model.) Patented in England October 1, 1881. No. 4,268.

To all whom it may concern:

Be it known that I, WILLIAM WILKINSON, a subject of Her Britannic Majesty, residing at Wigan, in the county of Lancaster, England, have invented new and useful Improvements inVertical Multitubular Boilers known as Field s, of which the following is a specification; I

My invention relates to vertical boilers fitted with'han'ging tubes in the crown of the box known as Fields, and is designed to prevent priming and the deposit of scale in the tubes, and also to protect the-uptake from corrosion by the flames. I attain these objects by the following apparatus, illustrated in the accompanying drawings, in which- 7 Figure 1 is a general sectional elevation of a boiler with my improvements. Fig. 2 is a detail of my apparatus to prevent priming and deposit of scale, and Fig. 3 is a detail of my boiler-uptake to-prevent corrosion.

Like letters refer to similar parts in the different figures.

A is a hollow circular dish or basin, which is fixed with the hollow upward, upon the uptake B of the boiler, and extending over the mouths of the inner rows 'of Field tubes 0. This dish serves to catch deposit and scale and to preventthe same from falling into the Field tubes 0. It also acts as a baffle-plate to divert the upward current of steam and water as ejected from the Field tubes. The water is thus separated by percussion from the accompanying steam, and priming, to which such boilers are otherwise very liable, is prevented.

I construct the uptake B with a double shell, the inner one, E, being of comparatively thin section, while the outer one, F, is of a suitable strength to resist the internal boiler-pressure. The two shells are riveted or otherwise connected together at the bottom, but stand apart for some distance at the top. This V- shaped annular space is filled with fire-clay or other refractory substance, soas to protect the outer shell, F, from the corrosive action of the flames. The upper part of the boiler-shell G is riveted to the outer and stronger shell, F, of

the uptake.

Fig. 1 shows further adjuncts to the boiler in the shape of superheating, drying, and condensing chambers, which I do not seek to secure in this application, but show the adaptation of my improvements to upright boilers of tram, road, or traction engines, with these further adjuncts which I seek to patent in another application. 7

I am aware of the perforated deflector shown and described in English Patent No. 1,530 of 1876, and hereby disclaim the same as outside of my invention and illustrative of old means to prevent priming in vertical boilers.

What I consider novel, and now desire to protect, is

1. In a vertical boiler having hanging tubes, as herein specified, an imperforate hollow disk surrounding the uptake and supported by the latter, substantially as shown, for the purposes set forth.

2. In a vertical boiler having hanging tubes, as herein specified, the double-walled uptake B, having its main shell F exposed within the steam-space, and provided with a packing of refractory substance between its walls, substantially as herein described, for the purpose set forth.

3. In a vertical boiler having hanging tubes,

as herein specified, the combination of the double-walled uptake B, having an upwardlyflaring main shell, F, exposed within the steamspace, and the imperforate hollow disk A, surrounding said shell F, and supported thereby,

substantially as shown and described, for the purposes set forth.

Wigan February 9, 1883.

WILLIAM -WILKINSON. Witnesses:

THOMAS EDWARD SWANN, 9 Horsefield Street, VVigan, Solicitofls Clerk. THOMAS BARROW, v Greenough Street, Wtgan, Solicitofis Clerk. 

